Vulnerability · Published Dec 2, 2025 · Assigned by GitHub_M
CVE-2025-64750Singluarity ineffectively applies of selinux / apparmor LSM process labels
Medium 4.5
In plain English
A medium-severity security flaw in singularity from sylabs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
SingularityCE and SingularityPRO are open source container platforms. Prior to SingularityCE 4.3.5 and SingularityPRO 4.1.11 and 4.3.5, if a user relies on LSM restrictions to prevent malicious operations then, under certain circumstances, an attacker can redirect the LSM label write operation so that it is ineffective. The attacker must cause the user to run a malicious container image that redirects the mount of /proc to the destination of a shared mount, either known to be configured on the target system, or that will be specified by the user when running the container. The attacker must also control the content of the shared mount, for example through another malicious container which also binds it, or as a user with relevant permissions on the host system it is bound from. This vulnerability is fixed in SingularityCE 4.3.5 and SingularityPRO 4.1.11 and 4.3.5.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.23 | singularity | 4.3.5-r0 | ALPINE-CVE-2025-64750 |
| Alpine:v3.24 | singularity | 4.3.5-r0 | ALPINE-CVE-2025-64750 |
| Go | github.com/sylabs/singularity | no fix listed | GO-2025-4177 |
| Go | github.com/sylabs/singularity/v4 | 4.1.11 | GHSA-wwrx-w7c9-rf87 |
| Go | github.com/sylabs/singularity/v4 | 4.3.5 | GHSA-wwrx-w7c9-rf87 |
| Go | github.com/sylabs/singularity/v4 | no fix listed | GO-2025-4177 |
| Ubuntu:25.10 | singularity-container | no fix listed | UBUNTU-CVE-2025-64750 |
| Ubuntu:26.04:LTS | singularity-container | no fix listed | UBUNTU-CVE-2025-64750 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| sylabs | singularity | > 4.2.0-rc.1, < 4.3.5< 4.1.11 |
Weakness: CWE-61, CWE-706 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L
References
- https://github.com/sylabs/singularity/security/advisories/GHSA-wwrx-w7c9-rf87 x_refsource_CONFIRM
- https://github.com/opencontainers/runc/security/advisories/GHSA-cgrx-mc8f-2prm x_refsource_MISC
- https://github.com/sylabs/singularity/pull/3850 x_refsource_MISC
- https://github.com/sylabs/singularity/commit/27882963879a7af1699fd6511c3f5f1371d80f33 x_refsource_MISC
- https://github.com/sylabs/singularity/commit/5af3e790c40593591dfc26d0692e4d4b21c29ba0 x_refsource_MISC
- https://github.com/advisories/GHSA-fh74-hm69-rqjw x_refsource_MISC